/**
   A class to compare numbers.
*/
public class Numbers
{
   /**
      Checks whether three numbers are all different
      @return true if none of the numbers a, b, or c are equal to another
   */
   public boolean allDifferent(int a, int b, int c)
   {
      // your work here
      return (a!=b && b!=c && c!=a);
   }
}